Forging machine



FORGING MACHINE Fil pr l 25, 1923 4 Sheets-Sheet 1 raj W541 77?/M.BLE M /fff IN VEN TOR.

mama

' May 31, 1927.

- 1,630,599 N. T. M KEE FORGING MACHINE Filed April 25. 1923 4 Sheets-Sheet 2 BLE k NEAL 7777/ M INVENTOR.

A TTORNEY.

N. T. M KEE FORGING MACHINE Filed April 25; 1923 4 Sh'eets-Shet 3 lVE/IL TRIM E M KEE I N VEN TOR.

A TTORNE Y.

Patented May 31 1927.

NE rRIMBL'E 'MCKEEQ F Monivu: vsswommw itate Magenta i masthead April '25," 1923, Seri al 1\fo This invention relates to forging 1111a,?

" chines of the type employed for forgingtor- 'gether a pairofpipes'in the manufacture' of superheater elements and" the -"'l1ke.: M0re i 1 particularly the invention relates -to jnia' chi'ne's having palrs of grlpping-j and; forming dies between which the pipes are inserted and a reclpro'cating punchcooperatlngivvlth tion.

the-forming dies to effect the forging opera an improved machine-in which the forging operation is carriedout -'more' expeditiously than hitherto whereby the; life "of the dies is prolonged and thfelowering 11'1" temperature during the insertionof the tubes "into the machine and the actual" forging is reduced whereby the riskof'jforlnation of' bad joint-s is avoi ded. I 1

The invention consists in a forging machine cornprising' a reciprocating forging tool, andfa reciprocating, prime mover for operating said'tool, the movement of said prime mover in'one direction causing 'a coin "pletereciprocation'of theforgingtool.- p

According to one convenient formflthe forging tool is "reciprocated through-the agency of toggle 'leversthe. operation of =which. is controlled preferably by a 'c'o'mpressed air cylind'erl According to a further I vention the t gripping and. forming 5 diesare tion respectively;

simultaneously opened or closed, preferably by means of atoggleflever operate'd by an air cylinder.

Further features of'invehtion will behereinafter' describediand defined in) the, claims.

"Inthe accompanyingdrawings which ilinvention:

Figs '1 andQshoW the ends of a pair'ot" after the forging opera-.1 I i i of the air cylinder-operates through the v pipes before and 7 Fig.3 is anoutside elevation of the machine illnstr'a'ting particularly the controlling valves and; pipe lines forthecompressed amin L Fig {4' is a? sectional elevation on theline 44, 4 fV gu re a y The objec-tfiof the invention is toj provide I feat ure'of the inscrews 24: 3 -5- I p to beffo'rgedtogetheri, 'Instratea forging lmachineaccording to the Flg; 7 is a sectional steam; the 115;

7, 7 of'F-ig. 5, While I 1 ig$81is adetail of theair cylinder for "operatingthepunch;a l I The machine to :be described is adapted" for'forging the ends of al pairioftubes to- 5 i gether-as illustrated in"Figs.1;l and 25am cordlng to the processclainied in Patent No) -1,169,209.' g-

-\ Y I; I

n In-Qcarryingfthe inventioncintofeffect as illustrated in the drawings]a i f J Eng d1es-9, 10 isprovided at one end of the v v of e machine whilethe. die 9 ismountedi machine. T e die 10 is fixed-in the bed "11 XoRii AssrGNoR stirring ."ssmaefa a n Great:niitaialvzay19,4922; f,

theflever :12 pivoting ontheshaft 13. The die 9 is held uponithe lever 12 bythe bolt 14- andin order to provide for a slight 'rock*- 7 "ing of-the diea space isleftbetween the die a'nd the surface 15' of the recessin-th e lever I i V in which it -i'slocated, a pinIGbeing provid ed between the die andtheleven'l, A spring.

-17 provided in a recess inthe lever and abuts against the head ofthe bolt 14.;

- Ata suitable distance from-the gripping dies apair of' forrningdies '18 and 19 is provided the die '18 being T mounted rigidly I 7 upon a lever 2O pivoting on the sh aft 13, While the die 19 is rigidly-mounted on the.

"bedof the-' machine --respectively by the d p ces: 21 and 22 and bolts 23 andfst .Th'eg ppi areffirlnly gripp'ed'tothe leve'r 20 and the I s and-jorfming dies'are providedfwith suitable vrecesses to take the -pipes] as tofclosethe dies'a compressed air cylin der '25 is provided snitablybolted to the i l In order to ,pivotcthelevers" l 2 and 20150 framework ofthe machine. The piston 26 memberm upon-the toggle levers 28," 29'to' whichf the n'pper end of the meinber is connected' 'bv' a,--pini 30.f The levers- 28 'pivot uponlaishaftr3ll earried in brackets' 32 exv,

tending laterally gfi the frameworkfofijgthe machine. ,The lever. 29 terminates in a l ,ing recess in a cross lever 34: the ends 01:

which are located in recesses 35 in the die carrying levers 12 and 20. Pivotal connections are formed between the cross lever 34' and the levers 12 and QOI-by thehinge pins 36 carried by-ith'e' levers ,12' and '20,

The

spherical seat'in the cross lever 34: may be di pese midway b we -i ends- The hiembef '27 s prov'de l. at'its lower end With a spherical surface 37Whih seats in a cavity in the piston (curved path of the pin upper end: of the member .127- is. torked as V seen in Fig. 3 and a pin '38 is located be tween} said V riphery 31 providesa' suitable device Ifor holding v .theshaft 'orks, the pin 38bei1ig carried by a crosshead '39 mounted u'ponithe pis- In order to permit adjustment oflthe tog; gle 28,29the levers 28" are mounted-upon 'an'eccentric portion of the shaft'3l and-the latter is provided with a Suitablesquared en'duv hereby it may be. partially rotated to make the necessary adjustment;

1 IA wheel or} diSC lO having a serr ated or" toothed pcand rigidly mounted upon the shaft v in itsadjusted position; ca-screili' tl' carried by thei framework being provided for engagement with said teeth or serrations; 'i'

' T/Whii thedies arein closed-position as indicated in' Figs. .6 and? the forming dies arepos'itively held together by eans-of th l'ocking lever 42 Which is pivotedina bearing 43 carriedby the lateralibrackets' 32 of thejframeivorlc The loCkin'g" l ve &2 automatically moves IintQ. the Fl oding .PQ'S

tion, onfclos'ing' the dies, by theacti n of the spring 4A1 One lend-of the latteris con- -nected toapin 46 carried by- Avhile the other end, is connected to the, foot he fra ewo 7 lever e7 pivot d at 4,8 a hav ng a peda Y Alink 50 connectsthefootlever with the locking lever 74:2;

' "After the-forging operation-the locking lever is removed fil mthelocking position by pressure on the pedal e9. The'di'e carryinga levers 12 an 2.0iprojept thr oughre- "p'lzite 53 and th .guid nglll ilibfi sl l -y ll h cesses .51 inthe bed of the machine-and are guided by'the central packing piece 52, the

plate '53 and guid'ing 'l nernber are rigidly 53 a1' esuitably='cut awayto permit the 111-,

's r; :iiuneh 5.7 'WhiQh basis ne -i01 5 held in position by bolting to'the frame;

"w r Whil the Pack ng M906 i QQ9 Y lF in position' y b l and sp ng 155 (se a- E pa king nie 2 and Plat rtiqn of the Work piiee,l th -f emeii el Qfrhfe machine being su tablyre essed 55 1.11 "axial alignme ii thithe i th adapted t slit he tub s? and-e t ssin shoulder -i;-

tried iii .zan ediiietalile holder which turn is carried by the 26 er by-elm permitted The the holder nia-yjhe effected. I

. ,Recip-ro cat' .on off the plunger'fil is efiected;

Part 81 pf lleleeellie r t a The controlling gear w ll newb e described with" reference to Fig,- 3. Qomp-ressedair 1s eve 83 plunger 61, Thelatteris adapted to recipro- 7 cats in the cylindrical 'seating' 62, rotation being prevented by the flat surface 63 011: the plunger contacting with a Wearing strip he d i p si ion by the coyer'pla e 64:,

"1 1 ie-y q 'ii te l ne-t 6.9 i fiesmaybe effected.

i 1 to t l e plunger and is gripped in position Y by -.t1l@ b lw p sing tlireugh both mambjers, the hole on part 60' "being larger than the' bolt \vliereby lateral adjustment 'Ofl tl1]eh older with reference to the plunger tl lrepuncl i i-held,inphe h older in-a siini la-r manner by the bolt 66 whereby vertical ju tment .of the 111101 with refe ence t0 byjfneans of the toggle levers 67, 6, ne

while the other is connected 'a t -TO- tO .crum bracket 71 fined loy' bolt-S 1 :2 to end of the rnz 1chin e.fv

Referr ng r ar-f gee 'i atiei f he teegle 67, 68"is effected by the'doubleac ting pre sed r yl nde J me pistes of vvhich is connected by the link 5 {to tllc fi ed 4n swa 16 the deadcentre and togthe position i In order toadjustft e' lenses-fi ia trave of the punch 57 the positi n "of 1 6' i l lm ket adset "t e a i' r t fw b re ers m h fram W1 9 l lieme lii e For h s pu mseapa kipg r e e .;is proupp e w re nin 1 .1 a d s le by the itr l i s the ai r a ml x2 elin s a v and84 to the cylinder 7 25- .fl hs v lvss 83 an 8 ers ctneted' y hand. by the hand lever Sfiflandlinks 87; 88Q

llyalve" connects the valves 83 velv i a c le eratiielw l nd air wi fl vhr l ehi a ai e eas as to cause a gentle closing of the .diesbefore the valvede. e

i Branch'pipes 89, 90 connectlupi the inlet wh e-1, 92m the p pe l n generat o the Wives a 512 by was of' t e fee an k l tia mit "rl'throushii n lines 95 to the cylinder x full pressure is admittedto the cylinder by The return seeks ot-the? garm nts is caused by the operation 1 f ,yalve 96 vvhich connects the, cylinder with"pipe "line ous closing of the 82 by Way of branch 97 and pipe 98 The valve 96 is controlled by the hand lever 99 and link 100.

' The operation of the machine is as follows: Y V

After insertion of the pipes between the it dies, the valves 83 and 84 are opened, seriatim, by the lever 86 to effect thesimultanegripping and fOrming dies 9, 10, and 18, 19; 7 r

The locking lever 42 automatically locks the forming dies 18, 19 under the'action of the spring l l. Air is then admitted to the cylinder'73 by actuating the footlever 93] against the action of. the spring 101 to open the valves. 91, 92. Such action causes the punch 5'? 1 to moveinto and out ofthe work.

Releasing the foot lever'93 allows the spring 101 toreturn the valves-91, 92 into the exhaust position. The locking lever 42 is then withdrawn by pressing on the foot pedal 49. Movement ofthe lever 86- to the I, exhaust position allows air toexhaust from cylinder. 25 and "releases-the grippingand forming dies 9, 10 and 18, 19 the levers falling back under their own weight. The foot pedal 49 is then released so that the lockinglever 42 rests upon the upper end of the lever 20. I I By means of the valve v96 operated by the lever 99 air is admitted to cylinder 73x0 're-. 1 turn'the toggle 67, 68 to the upf position after which the lever 99 is again moved to put valve 96" in exhaust position. The cy-' 'cle may now be repeated.

In order to provide a cushioning effect at" the end of the operative or down 'strokeof. the cylinder 73 a rubber washer 102 (Fig;

8) is provided and in addition the exhaust of the valve 96 is throttled toiasuitable] degree. 7 A I gauge plate 103 is provided att e sea of the machine to limit thelength ofp lpe i inserted into'the machine. v

' It will be obvious that by a suitable modi that the width thereof is reduced as much i as possible in order to; facilitate the han-' 2 dling of 'superheater units comprising a plurality of return bends so that the parts not being operated upon 'are not liable-tobecomedamaged. Forthe same purpose the V dies are arranged at the extreme upper part of the machine. v

By means of a machineoperating accord- 4 .'ing to thelabove described principles the I lapse of "time between -the insertion and I gripping of the tubes in thedies andthe operation of'the punch may bejreduced to a minimum whereby thereduction-in tempera machineshitherto employed, and further the zture of the work is lmuch lower than with insertion. and withdrawal 'of theforging tool is more expeditious'tha'n hitherto, thus prolonging the ies; of thefcool; By this speeding up of the'process the riskofim- 1 perfect joints is practically eliminated.

It will be obvious that many'modifications it scope of the invention.

' What I claim is:

may be made without departing from the '1. In a forging machinegthe combination I I of a pair'of gripping dies, a pair of forging 1 v dies'alined with them, one die of each pair being mounted to a fixed portion of themachine, the other dies being mounted eachto" a lever, and} mechanism to. move the two levers simultaneously abouttheir. pivots 'so as ftofopen'or close the two dies simultaneouslyry Y 7 2." In a forging machine, the combination of a pair of gripping dies, apair of forging dies alined with them; one die of each pair V :beingmounted to a fixed portionof the ma-- chineythe other dies'being mounted; each to a lever, across-lever engaging both levers,

gages-the cross-lever,

and mechanism to op Grate oggle joint, r

fa togglejoint one movable end of whichem i I i 3. In a forging machine, the combination f "of a pair of gripping dies, a pair offorging dies alined with'them, one die of each pair beingmounted to a fixedportionofjthe ma'-; chine, theother dies being mountedeach to a lever, a cross-lever engagingboth levers, t a toggle jo nt the movable end of Which en gages the cross lever'at its mid-pointby means of a spherical joint, a cylinder, a piston reciprocable in the cylinder, mean'sf'o'peratively connecting the piston'to the-mid dle joint of the toggle, and means to admit pressure fiuidto the cylinder.

uEAL-TRI BLEMoKEE. 

